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Finding the Fourth Proportional to 572.22, 790.11 and 439.23

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Solution

The fourth proportional to 572.22, 790.11 and 439.23 is: 606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.22 : 790.11 = 439.23 : x
  2. Step 2: Convert to fraction form
    572.22/790.11 = 439.23/x
  3. Step 3: Cross multiply
    572.22x = 790.11 × 439.23
  4. Step 4: Simplify right side
    572.22x = 347,038.92
  5. Step 5: Solve for x
    x = 347,038.92/572.22
  6. Step 6: Final answer
    x = 606.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.